i am using PIC18f258 microcontroller ,H-bridge and potmeter.Potmeter used as feed back.want to control speed and position of servo permant magnet motor i.e.geared servo motor with some load.how i can do it.I am using in build PWM module to control speed with 1Khz frequency.I can drive motor after 75% duty cycle.how i can drive with less duty cycle.is it reducing frequency of PWM2683 need help for it2683also,How to control position in this